According to preliminary national estimates, ”Hell’s Kitchen” dominated Monday’s opening hour in most key categories (2.6/8 in 18-49, 6.3 million viewers overall), holding steady week to week. And at 9, ”MasterChef” (2.7/7 in 18-49, 6.4 million viewers overall) edged up for a fourth straight week and also easily led its hour. The Fox shows stood as the night’s top two telecasts in both 18-49 and total viewers.

NBC followed a repeat of ”Fear Factor” (1.3/4 in 18-49, 4.1 million viewers overall) with the two-hour finale of ”American Ninja Warrior” (2.0/5 in 18-49, 4.9 million viewers overall), which grew 11% week to week and comfortably led the 10 o’clock hour.

At ABC, the third-season premiere of ”Bachelor Pad” settled for a 1.4/4 in 18-49 and 4.7 million viewers overall from 8 to 10 p.m., down more than 30% from last year’s opener. And the net continues to see weak scores at 10 p.m. for ”The Glass House” (0.8/2 in 18-49, 2.3 million viewers overall), which tied Telemundo for fourth-place among the broadcasters in the 18-49 demo.